Inventor

ICHIHARA MASAKI

JP64 patents

⚠️ This page may combine multiple inventors who share the name “ICHIHARA MASAKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ICHIHARA MASAKI

NEC CORP

Output level control circuit for use in rf power amplifier

Orthogonal frequency division multiplex modem circuit

System for providing charge between communication devices

Predistorter

Transmission power controller for use in mobile communication terminal equipment

Transmisson diversity system

Ripple-free phase detector using two sample-and-hold circuits

Mobile station with transmission power control system

Amplitude calculation circuit

Method and apparatus for adjusting transmission power of a CDMA terminal

Password updating apparatus and recording medium used therefor

Transmission power control device capable of decreasing current consumption

Mobile communication terminal for rapid adjustment of a reference frequency to a target frequency

Diversity circuit

CDMA communication system

Signal communication device operable in a CDMA mode and an FM mode

Variable gain amplifying device

Transmitter and method for transmitting a modulated wave with variable envelope

Circuit for preventing overdischarge of rechargeable battery pack consisting of a plurality of rechargeable batteries

Digital mobile radio communication system

High frequency module and method of producing the same

Frequency synthesis using frequency controlled carrier modulated with PLL feedback signal

Arrangement for converting binary input signal into corresponding in-phase and quadrature phase signals

Phase lock loop circuit with a subsidiary loop filter

Device operable like an automatic level control circuit for decoding a multivalued signal

Portable radio apparatus capable of keeping antenna away from user when calling

Quadrature modulator having circuit for correcting phase error

Multi-band wireless transceiver and method of controlling the same

Mobile terminal device and positional information system

Frequency correction method and apparatus for correcting secular change

Baseband circuit incorporated in direct conversion receiver free from direct-current offset voltage without change of cut-off frequency

Frequency shifting circuit and method

Information terminal apparatus having a variable directional antenna and control method thereof

PLL circuit having a variable output frequency

Method and circuit for controlling baseband gain

Digital radio receiver having limiter amplifiers and logarithmic detector

Amplitude deviation correction circuit

Frequency modulation circuit

PLL circuit and noise reduction means for PLL circuit

Circuit for preventing overdischarge of rechargeable battery pack consisting of a plurality of rechargeable batteries

Bias controller for decreasing bias current supplied to amplifier without sacrifice if distortion

Signal oscillator, FM modulation circuit using the same, and FM modulation method

Narrow-band filter having a variable center frequency

Time constant detecting circuit and time constant adjusting circuit

Integrated-circuit sampled-and-hold phase detector with integrated current setting resistor

High-speed A/D conversion using a series of one-bit conversion stages

Circuit for code converting PCM codes

Compound information terminal, mobile communications system and control method thereof

Portable radio apparatus capable of keeping antenna away from user when calling

NIPPON ELECTRIC CO

Power supply systems for use in radio communication systems